#!/usr/bin/env python

# Copyright (c) 2009, Purdue University
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# Redistributions of source code must retain the above copyright notice, this
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# may be used to endorse or promote products derived from this software without
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"""List views and dns server set view assignments for roster"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.18'


import sys
import operator

from roster_user_tools import cli_common_lib
from roster_user_tools import roster_client_lib
from roster_user_tools.action_flags import List
from roster_user_tools.data_flags import View


class Args(List, View):
  pass


def main(args):
  """Collects command line arguments.

  Inputs:
    args: list of arguments from the command line
  """
  command = None
  if( args and not args[0].startswith('-') ):
    command = args.pop(0)
  usage = ('\n'
           '\n'
           'To list views:\n'
           '\t%s view [-v <view-name>]\n'
           '\n'
           'To list dns server set view assignments:\n'
           '\t%s dns_server_set [-v <view-name>] [-e <dns-server-set>]\n'
           '\n'
           'To list acl view assignments:\n'
           '\t%s acl [-v <view-name>] [-a <acl-name>]\n'
           '\n'
           'To list view assignments:\n'
           '\t%s view_subset [-v <view-superset-name>]\n'
           '\t[-V <view-subset-name>]\n' % tuple(
               [sys.argv[0] for _ in range(4)]))
  args_instance = Args(command,
      ['view', 'dns_server_set', 'acl', 'view_subset'], args, usage)
  options = args_instance.options

  try:
    cli_common_lib_instance = cli_common_lib.CliCommonLib(options)
  except cli_common_lib.ArgumentError, error:
    print 'ERROR: %s' % error
    sys.exit(1)

  print_list = []

  if( command == 'view' ):
    if( not options.no_header ):
      print_list = [['view_name']]

    #The user can list all views if they omit the -v/--view flag
    all_views = roster_client_lib.RunFunction(
        u'ListViews', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server)['core_return']

    #If they didn't omit the -v/--view flag, only list the supplied view
    #We have to check if it exists first though.
    if( options.view_name is not None ):
      if( options.view_name not in all_views ):
        print 'ERROR: View %s does not exist' % options.view_name
        sys.exit(1)
      else:
        all_views = [options.view_name]

    for view in all_views:
      print_list.append([view])

    print cli_common_lib.PrintColumns(print_list,
        first_line_header=not options.no_header)


  elif( command == 'dns_server_set' ):
    dns_server_set_view_assignments = roster_client_lib.RunFunction(
        u'ListDnsServerSetViewAssignments', options.username,
        credfile=options.credfile, credstring=options.credstring,
        server_name=options.server)['core_return']

    if( not options.no_header ):
      print_list = [['dns_server_set', 'view_name', 'view_order', 'view_options']]


    for server_set in dns_server_set_view_assignments:
      for assignment in dns_server_set_view_assignments[server_set]:
        print_list.append([server_set,
                          assignment[0], 
                          assignment[1],
                          assignment[2]])

    print cli_common_lib.PrintColumns(print_list,
        first_line_header=not options.no_header)


  elif( command == 'acl' ):
    view_acl_assignments = roster_client_lib.RunFunction(
        u'ListViewToACLAssignments', options.username,
        credfile=options.credfile, credstring=options.credstring,
        server_name=options.server,
        kwargs={'view_name': options.view_name, u'acl_name': options.acl})[
            'core_return']

    if( not options.no_header ):
      print_list = [['view_name', 'acl_name', 'acl_range_allowed']]

    for assignment in view_acl_assignments:
      if( assignment['acl_range_allowed'] ):
        allowed = True
      else:
        allowed = False
      print_list.append([assignment['view_name'], assignment['acl_name'], allowed])

    print cli_common_lib.PrintColumns(print_list,
        first_line_header=not options.no_header)

  elif( command == 'view_subset' ):
    view_assignments = roster_client_lib.RunFunction(
        u'ListViewAssignments', options.username,
        credfile=options.credfile, credstring=options.credstring,
        server_name=options.server,
        kwargs={'view_superset': options.view_name,
                'view_subset': options.view_subset})['core_return']

    if( not options.no_header ):
      print_list = [['view', 'view_subset']]

    for view in view_assignments:
      print_list.append([view, ', '.join(view_assignments[view])])

    print cli_common_lib.PrintColumns(print_list,
        first_line_header=not options.no_header)

  else:
    cli_common_lib.DnsError(
        'Command %s exists, but codepath doesn\'t.' % command, 1)

if __name__ == "__main__":
  main(sys.argv[1:])
